Journal ArticleDOI
Tailoring the photoluminescence of atomically precise nanoclusters.
Xi Kang,Manzhou Zhu +1 more
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TLDR
Promising applications of metal nanoclusters are reviewed, with particular focus on their potential to impact the fields of chemical sensing, bio-imaging, and bio-labeling, and scope for improvements and future perspectives of these novel nanomaterials are highlighted.Abstract:
Due to their atomically precise structures and intriguing chemical/physical properties, metal nanoclusters are an emerging class of modular nanomaterials. Photo-luminescence (PL) is one of their most fascinating properties, due to the plethora of promising PL-based applications, such as chemical sensing, bio-imaging, cell labeling, phototherapy, drug delivery, and so on. However, the PL of most current nanoclusters is still unsatisfactory-the PL quantum yield (QY) is relatively low (generally lower than 20%), the emission lifetimes are generally in the nanosecond range, and the emitted color is always red (emission wavelengths of above 630 nm). To address these shortcomings, several strategies have been adopted, and are reviewed herein: capped-ligand engineering, metallic kernel alloying, aggregation-induced emission, self-assembly of nanocluster building blocks into cluster-based networks, and adjustments on external environment factors. We further review promising applications of these fluorescent nanoclusters, with particular focus on their potential to impact the fields of chemical sensing, bio-imaging, and bio-labeling. Finally, scope for improvements and future perspectives of these novel nanomaterials are highlighted as well. Our intended audience is the broader scientific community interested in the fluorescence of metal nanoclusters, and our review hopefully opens up new horizons for these scientists to manipulate PL properties of nanoclusters. This review is based on publications available up to December 2018.read more
Citations
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Journal ArticleDOI
Atomically precise alloy nanoclusters: syntheses, structures, and properties.
TL;DR: This review provides a comprehensive synthetic toolbox and controllable doping modes so as to achieve more alloy nanoclusters with customized compositions, structures, and properties for applications.
Journal ArticleDOI
AIE Triggers the Circularly Polarized Luminescence of Atomically Precise Enantiomeric Copper(I) Alkynyl Clusters
Miao-Miao Zhang,Xi-Yan Dong,Zhao-Yang Wang,Hai-Yang Li,Shi-Jun Li,Xueli Zhao,Shuang-Quan Zang +6 more
TL;DR: This paper designed a pair of chiral alkynyl ligands, (R/S)-2-diphenyl-2-hydroxylmethylpyrrolidine-1-propyne (abbreviated as R/S-DPM), and for the first time, successfully prepared and characterized single crystals of optically pure enantiomeric pair of atomically-precise copper(I) clusters.
Journal ArticleDOI
Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
Zhen Han,Xi-Yan Dong,Peng Luo,Si Li,Zhao-Yang Wang,Shuang-Quan Zang,Thomas C. W. Mak,Thomas C. W. Mak +7 more
TL;DR: Enantiomers of an octahedral Ag6 cluster prepared via one-step synthesis using designed chiral ligands at ambient temperature are reported, revealing that thermally activated delayed fluorescence is responsible for the high PLQY, which combines chirality in excited states to generate strong circularly polarized luminescence.
Journal ArticleDOI
Endohedrally Doped Cage Clusters
TL;DR: This comprehensive review presents results of many such developments in this fast-growing field including endohedrally doped Al, Ga, and In clusters, and performs ab initio calculations to present updated results of the most stable atomic structures and fundamental electronic properties of the endohedral doped cage clusters.
Journal ArticleDOI
A New Class of NIR-II Gold Nanocluster-Based Protein Biolabels for In Vivo Tumor-Targeted Imaging.
Xiaorong Song,Xiaorong Song,Wei Zhu,Xiaoguang Ge,Renfu Li,Shihua Li,Xian Chen,Jibin Song,Jianping Xie,Xueyuan Chen,Xueyuan Chen,Huanghao Yang,Huanghao Yang +12 more
TL;DR: The renal-clearable and host-guest recognition-based NIR-II biolabels developed in this study provide a promising platform to monitor the physiological behaviors of biomolecules in living organisms.
References
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Journal ArticleDOI
The construction of a FRET assembly by using gold nanoclusters and carbon dots and their application as a ratiometric probe for cysteine detection
TL;DR: Forster resonance energy transfer (FRET) is a powerful tool to study single molecular conformation and/or distance changes between two fluorophores, which is mainly depended on the combinations and spatial distance between the donor and acceptor as mentioned in this paper.
Journal ArticleDOI
Protein-based fluorescent metal nanoclusters for small molecular drug screening
TL;DR: A facile drug screening method based on synthesis of fluorescent gold Nanoclusters inside albumin proteins loaded with small molecular drugs and comparing the relative fluorescence intensities of the resultant gold nanoclusters has been developed and successfully applied for the quantitative measurement of drug-protein binding constants.
Journal ArticleDOI
Shape-Controlled Synthesis of Trimetallic Nanoclusters: Structure Elucidation and Properties Investigation
Xi Kang,Lin Xiong,Shuxin Wang,Haizhu Yu,Shan Jin,Yongbo Song,Tao Chen,Liwei Zheng,Chensong Pan,Yong Pei,Manzhou Zhu +10 more
TL;DR: This study presents a controllable strategy for synthesis of alloy NCs with different shapes (by alloying heteroatom complexes coordinated by different ligands), and may stimulate future work for a deeper understanding of the morphology (shape)-property correlation in NCs.
Journal ArticleDOI
Solvent-induced intercluster rearrangements and the reversible luminescence responses in sulfide bridged gold(I)–silver(I) clusters
TL;DR: Structural data suggest that intermolecular Au···Au interactions account for the luminescence vapochromic responses in gold(I)-silver(I) molecular cluster.
Journal ArticleDOI
Magnetic Ordering in Gold Nanoclusters
Mikhail Agrachev,Sabrina Antonello,Tiziano Dainese,Marco Ruzzi,Alfonso Zoleo,Edoardo Aprà,Niranjan Govind,Alessandro Fortunelli,Luca Sementa,Flavio Maran,Flavio Maran +10 more
TL;DR: In this paper, electron paramagnetic resonance (EPR) was used to detect magnetism in monolayer-protected gold cluster samples, but the results were often contradictory, and thus, a clear understanding of this phenomenon was still missing.